Question 1 of 4
Basic

What is free passage and why is it important?

Question 2 of 4
Basic

What is the recommended upper limit for particle size when using semi-open impellers?

Question 3 of 4
Basic

What is greywater?

Question 4 of 4
Basic

How is untreated wastewater including toilet discharge inside buildings with solids no larger than 50 mm defined in the module?

Question 4 of 4
Basic

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1: What is free passage and why is it important?
Free passage is used only to define the type of wastewater by particle or solids size and has no impact as such on the pump hydraulics
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1: What is free passage and why is it important?
Free passage is another way of describing input or output pipe diameter
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1: What is free passage and why is it important?
Free passage describes the particle or solids size that can pass freely through the pump hydraulics and is important to avoid clogging in the pump
2: What is the recommended upper limit for particle size when using semi-open impellers?
Up to 35 mm
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2: What is the recommended upper limit for particle size when using semi-open impellers?
Up to 50 mm
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2: What is the recommended upper limit for particle size when using semi-open impellers?
Up to 12 mm
3: What is greywater?
Untreated wastewater from wash basins, showers, floor drains and appliances containing fibres and solids no larger than 10 or 35 mm
3: What is greywater?
Sewage mixed with rainwater, collected groundwater and other raw water with solids up to 80mm
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3: What is greywater?
Rainwater – it looks grey when it flows on built up surfaces
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4: How is untreated wastewater including toilet discharge inside buildings with solids no larger than 50 mm defined in the module?
As blackwater
4: How is untreated wastewater including toilet discharge inside buildings with solids no larger than 50 mm defined in the module?
As sewage
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4: How is untreated wastewater including toilet discharge inside buildings with solids no larger than 50 mm defined in the module?
As brown water
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